Engine



Patented 1an. -3, |899.

D. P. HARTMAN.

ENGINE.

(Application tiled Sept. 17, 1897.)

3 Sheets-Sheet l.

(No Model.)

QZL'S fjrZ-m my No., 617,249. Patented 1an. s, |899.

o] P. HARTMAN.

ENGINE.

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No. 617,249. Patented 1an. 3, |899.

' u. P. HARTMAN.

ENGINE.

l (Application med sept. 17, 1897.) (No Model.) 3 Sheets-Shui 3.

OLLIS P. HARTMAN, OF TAYLOR, TEXAS.

ENGINE.

SPECIFICATION forming part of Letters Patent No. 617,249, dated January3, 1899.

Application filed September 17, 1897. Serial No. 652,061; (No model.)

TactZZ whom it may concern.-

Be it known that I, OLLIs P. HARTMAN, a citizen of the United States ofAmerica, residing at Taylor, in the county of Williamson and State ofTexas, have invented certain new and useful Improvements in. Engines;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The invention relates to engines; and it consists of the construction,combination,- and arrangement of parts which will be hereinafter morefully described and claimed.

In the drawings formin ga part of this specication, Figure 1 representsa perspective view of an engine constructed according to my invention.Fig. 2 is a vertical longitudinal section through the high andlowpressure cylinders and the parts connected directly thereto. Fig. 3 is aside elevation of the same, showing the cover of the steamchest and thevalve which moves therein removed. Fig. 4 is an end elevation of thehighpressure cylinder, showing the parts leading therefrom to thelow-pressure cylinder, the low-pressure cylinder being shown partly insection and partly in elevation. Fig. 5 is a horizontal section throughthe steam-chest, showing thevhigh-pressure cylinder partly broken away.

Like reference-numerals indicate like parts in the different views.

The high-pressure cylinder 1 is horizontally arranged and has thelow-pressure cylinder 2 mounted upon it. The piston 3 and the piston-rodi of the high-pressure cylinder are both of the ordinary form andconstruction. Pivoted to the outer end of the piston-rod f1 is a pitman5, which is pivoted eccentrically to a disk G upon the drive-shaft 7, sothat the reciprocation of the piston 3 will cause a rotation of saidshaft. Upon one side of the cylinder 1 is the steam-chest S, having thelive-steam inlet-pipe 9 entering the same at one end. Steam-inlet ports10 11 lead from the steam-chest 8 to the interior of the cylinder 1, atopposite ends thereof. Exhaust- `ports 12 and 13 communicate with theexhaust-steam feed-pipes 1-1 and 15, respectively, which enter thelow-pressure cylinder 2, at the upper and lower ends thereof. The saidports 10, 11, 12, and 13 are controlled by a slide-valve 1G, whose stern17 extends through one end of the chest 8 and is suitably connected withan eccentric upon the drive-shaft 7 or other suitable part of theengine, whereby the reciprocation of said valve at the proper time willbe effected.

The low pressure cylinder has moving therein the piston 18, thepiston-rod 19 of which extends through the head of the cylinder and iscoupled through a link 2CD with one arm of a rocking lever orwalking-'beam 21, which is fulcrumed at a point intermediate of its endsto the upright or standard 22, as clearly shown in Fig. 1 of thedrawings. The opposite end of said walking-beam is connected through therod or pitman 23 with the disk 6, at the point of attachment of thepitman 5 therewith. Upon the upper end of the cylinder`2 is located aguide-frame 21, consisting of a base and four upwardly-extendingparallel arms 25, between which iits and moves the walking-beam orrocking lever 21. The said beam 'is prevented from lateral displacementby saidA guide-arms in a manner which is apparent. The'upper end of thepiston-rod 19, adjacent to its point of connection with the link 20, isformed with laterally-extending lugs or projections 26, which arelocated at right angles to the walkingbeam 21 and fit and move betweenthe guidearms 25. These prevent a movement of the piston-rod 19 in thedirection of the length of the beam 21, so that by the provision of thefour arms 25 said piston-rod is caused to move in a direct verticalline.

Adjacent to the upper and lower enzds of of the low-pressure cylinder 2are rotary exhaust-valves 27 and 28, respectively, the samecommunicating with a single exhaust-pipe 29. The stems 30 of said valveslead outwardly from their casings and have connected to `them crank-arms31 31. The said crank-arms are in turn connected together by a rod orbar 32, which is pivoted at a point intermediate of its ends to anauxiliary walkingbeam or rocking lever 33, fulcruined in the upright 22and connected at its opposite end to a pitman 34, attached to a ring 35upon an eccentric 36 on the drive-shaft 7. By this construction it willbe observed that the power from the high-pressure cylinder l will beexerted through the piston 3, piston-rod 4, pitman 5, and disk 5directly upon the driveshaft 7. The power from the low-pressure cylinder2 also will be exerted through the piston 18, piston -rod 19, link 20,Walkingbeam 2l, pitman 23, and disk 6 upon the drive-shaft 7. As thepitmen 5 and 23, however, are connected to the disk 6 at an angle itwill be evident that a dead-center can never exist. It will also beobserved that by means of the eccentric 30 on the drive-shaft and theauxiliary Walking-beam 33, which is connected to the rod 32 and throughit to the valves 27 2S, the rotation of said shaft Will automaticallycause the actuation of said valves at the proper time, the same being solocated relatively one to the other that when one is closed the otherwill be open and exhausting.

Having now described the invention, what is claimed as new is- Thecombination with the cylinder of an engine and the piston-rod thereof,of lateral projections on said piston-rod, a Walking beam pivotedthereto, and means for guiding said piston-rod in a direct line,consisting of a guide frame having four parallel arms thereon, betweenone pair of whichsaid Walking-beam ts and moves and is prevented fromlateral displacement, and between the other pair of which said lateralprojections t and move and are prevented from lateral displacement inthe direction of the length of said walking-beam.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

OLLIS I. I-IARTMAN.

Witnesses:

HENRY I-IARTM AN, FR. YOUNG.

